反应 #10027

反应方程式

MeOH

NH2OH

KCN

THF

citric acid

→

N-hydroxy-3-phenylpropionamide

收率 67.0%

反应条件

后处理

1. 1
   workup.ADDITIONwas added (25 mL)
2. 2
   萃取followed by extraction with EtOAc (3×25 mL)
3. 3
   其他The organic phase was isolated
4. 4
   干燥dried (MgSO4)
5. 5
   过滤filtered
6. 6
   浓缩the filtrate was concentrated in vacuo
7. 7
   其他to give a residue
8. 8
   其他The residue was purified by reverse phase HPLC (C-18, 5μ 100×30 mm column)
9. 9
   洗涤eluting with a gradient of acetonitrile

实验过程

To methyl 3-phenyl propionate (0.328 g, 2.0 mmol) in THF:MeOH:50% aqueous NH2OH (1:1:0.5, 2.5 mL) was added KCN (5 mg, 0.08 mmol, 4 mol %)) and the mixture was stirred at ambient temperature. After 3 h the reaction was complete by HPLC and saturated aqueous citric acid was added (25 mL) followed by extraction with EtOAc (3×25 mL). The organic phase was isolated, dried (MgSO4), filtered, and the filtrate was concentrated in vacuo to give a residue. The residue was purified by reverse phase HPLC (C-18, 5μ 100×30 mm column), eluting with a gradient of acetonitrile: water (0.05% TFA). Following lyophilization of the product fractions there was obtained pure N-hydroxy-3-phenylpropionamide (IIc) as a fluffy solid (0.220 g, 67% yield): LRMS (M+H)+: 166.0 m/z; 1H NMR (DMSO-d6) δ: 10.31(s, 1H), 8.68(br, 1H), 7.17(m, 5H), 2.79(t, 2H), 2.21(t, 2H); Anal (C,H,N): % C (calc) 65.44, (found) 65.38; % H (calc.) 6.71, (found) 6.61; % N (calc.) 8.48, (found) 8.08.

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